Solvent Effect on Crystal Structure of Tetracycline Hydrochloride

Hu, Xing Jun; Wang, Y.; Zhao, Yanpeng; Wang, G.; Bao, Ying; Xie, Chuang

doi:10.1002/ceat.201300147

Cited by 4 publications

(3 citation statements)

References 19 publications

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“…Moreover, the attachment energies of SFDBA crystal faces calculated by Materials Studio further confirm that the most thermodynamically stable crystal faces are {100} due to the lowest attachment energy (Table S4). [28] X-ray powder diffraction (XRD) patterns of SFDBA microcrystals in Figure 2h are completely in conformity with the SFDBA single crystals, and the strong {100} peaks parallel to the substrate represent the layer-by-layer structure of SFDBA microcrystals.…”

Section: Resultsmentioning

confidence: 63%

“Steric armor” strategy of blue fluorescent emitters to against photooxidation-induced degradation

Wang,

Zhang,

Wang

et al. 2024

Preprint

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Stability against oxygen is an important factor affecting the performance of organic semiconductor devices. Improving photooxidation stability can prolong the service life of the device and maintain the mechanical and photoelectric properties of the device. Generally, various encapsulation methods from molecular structure to macroscopic device level are used to improve photooxidation stability. Here, we adopted a crystallization strategy to allow 14H-spiro[dibenzo[c,h]a-cridine-7,9′-uorene] (SFDBA) to pack tightly to resist fluo-rescence decay caused by oxidation. In this case, the inert group of SFDBA acts as a “steric armor”, protecting the photosensitive group from being attacked by oxygen. Therefore, compared with the fluorescence quenching of SFDBA powder under two hours of sunlight, SFDBA crystal can maintain its fluorescence emission for more than eight hours under the same conditions. Furthermore, the photolu-minescence quantum yields (PLQYs) of the crystalline film is 327.37 % higher than that of the amorphous film. It shows that the crystal-lization strategy is an effective method to resist oxidation.

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Section: Resultsmentioning

confidence: 63%

“Steric armor” strategy of blue fluorescent emitters to against photooxidation-induced degradation

Wang,

Zhang,

Wang

et al. 2024

Preprint

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show abstract

“…Moreover, the attachment energies of SFDBA crystal faces calculated by Materials Studio further confirm that the most thermodynamically stable crystal faces are {100} due to the lowest attachment energy (Table S4). [ 32 ] X‐ray powder diffraction (XRD) patterns of SFDBA microcrystals in Figure 2h are completely in conformity with the SFDBA single crystals, and the strong {100} peaks parallel to the substrate represent the layer‐by‐layer structure of SFDBA microcrystals.…”

Section: Resultsmentioning

confidence: 76%

“Steric Armor” Strategy of Blue Fluorescent Emitters against Photooxidation‐Induced Degradation

Wang,

Zhang,

Wang

et al. 2024

Chin. J. Chem.

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Comprehensive SummaryStability against oxygen is an important factor affecting the performance of organic semiconductor devices. Improving photooxidation stability can prolong the service life of the device and maintain the mechanical and photoelectric properties of the device. Generally, various encapsulation methods from molecular structure to macroscopic device level are used to improve photooxidation stability. Here, we adopted a crystallization strategy to allow 14H‐spiro[dibenzo[c,h]acridine‐7,9′‐uorene] (SFDBA) to pack tightly to resist fluorescence decay caused by oxidation. In this case, the inert group of SFDBA acts as a “steric armor”, protecting the photosensitive group from being attacked by oxygen. Therefore, compared with the fluorescence quenching of SFDBA powder under 2 h of sunlight, SFDBA crystal can maintain its fluorescence emission for more than 8 h under the same conditions. Furthermore, the photoluminescence quantum yields (PLQYs) of the crystalline film is 327% higher than that of the amorphous film. It shows that the crystallization strategy is an effective method to resist oxidation.

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“…The crystal structure of L-arabinose was optimized by forcitemoduleswith "Fine" quality [31]. The simulation was conducted under such conditions: electronic charges were computed by "compass method" , and both the summation methods with a quality of "medium" were set to "Ewald".…”

Section: Morphology Prediction By Msmentioning

confidence: 99%

Theoretical Simulation and Experimental Study on the Crystal Morphology of L-arabinose

Hu¹,

Lei²,

Zhang³

et al. 2016

Proceedings of the 2016 International Conference on Biological Sciences and Technology

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The crystal morphology, growth faces as well as the structures of important facets of β-L-arabinose were simulated by BFDH, growth morphology(GM) and equilibrium morphology(EM) methods in this paper. By measuring the attachment energy and lattice energy of the crystal, the relative growth rates and morphology of the crystal is determined. Results show that the morphology of β-L-arabinose calculated by BFDH, GM and EM method is approximate rectangular parallelepiped, nearly cuboid and nearly spherical, respectively. The shape simulated by GM is consistent with the experimental crystal obtained by cooling crystallization. The {020} is the largest among all the facets calculated. Projection of the facet showed that there exists no hydroxyl group or hydrogen atom on the {020} facet, while some hydrogen atoms and a hydroxyl group appear on and outside the {101} facet. Conclusion: L-arabinose morphology can be modified by changing of standing layerthickness and the relative growth rate of {101} facet.

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Solvent Effect on Crystal Structure of Tetracycline Hydrochloride

Cited by 4 publications

References 19 publications

“Steric armor” strategy of blue fluorescent emitters to against photooxidation-induced degradation

“Steric armor” strategy of blue fluorescent emitters to against photooxidation-induced degradation

“Steric Armor” Strategy of Blue Fluorescent Emitters against Photooxidation‐Induced Degradation

Theoretical Simulation and Experimental Study on the Crystal Morphology of L-arabinose

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